Uncertainty analyses on the calculation of water environmental capacity by an innovative holistic method and its application to the Dongjiang River

Qiuwen Chen , Qibin Wang , Zhijie Li , Ruonan Li


Received October 28, 2013,Revised April 08, 2014, Accepted , Available online September 10, 2014

Volume 26,2014,Pages 1783-1790

The estimation and allocation of water environmental capacity (WEC) are essential to water quality management and social-economic interests. However, there is inevitable uncertainty in the capacity estimation due to model conceptualization, data collection and parameter calibration. An innovative holistic approach was developed, which took both independence and relevance between parameters into account to analyze the uncertainties in WEC calculation and estimate the margin of safety. The Dongjiang River was taken as the case to demonstrate the method, focusing on the chemical oxygen demand and NH4+-N thatwere the two major water quality problems in the river. The results showed that the proposed holistic approach is very promising and applicable compared to traditional methods of uncertainty analysis.

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